Onset MX2001-04-SS HOBO Water Level Data Logger (4m, 13ft)

Pressure (Absolute) and Water Level Measurements:

  Operation Range: 0 to 145 kPa (0 to 21 psia); approximately 0 to 4 m (0 to 13 ft) of water depth at sea level, or 0 to 7 m (0 to 23 ft) of water at 3,000 m (10,000 ft) of altitude

  Factory Calibrated Range: 69 to 145 kPa (10 to 21 psia), 0° to 40°C (32° to 104°F) 

  Burst Pressure: 310 kPa (45 psia) or 18 m (60 ft) depth

  Water Level Accuracy: Typical error: ±0.075% FS, 0.3 cm (0.01 ft) water; Maximum error: ±0.15% FS, 0.6 cm (0.02 ft) water  

  Raw Pressure Accuracy: ±0.3% FS, 0.43 kPa (0.063 psi) maximum error 

  Resolution: <0.014 kPa (0.002 psi), 0.14 cm (0.005 ft) water

  Pressure Response Time (90%): <1 second at a stable temperature 

Barometric Pressure:

  Operation Range: 66 to 107 kPa (9.57 to 15.52 psia) 

  Temperature Calibrated Range: -20 to 50°C (-4 to 122°F) 

  Accuracy: ±0.2 kPa (±0.029 psi) over full temperature range at fixed pressure; maximum error ±0.5% FS 

  Water Level Accuracy: Typical error: ±0.075% FS, 0.3 cm (0.01 ft) water; Maximum error: ±0.15% FS, 0.6 cm (0.02 ft) water 

  Resolution: <0.01 kPa (0.0015 psi) 

  Response Time: <1 second at stable temperature

Temperature Measurements:

  Operation Range: -20° to 50°C (-4° to 122°F) 

  Accuracy: ±0.44°C from 0° to 50°C (±0.79°F from 32° to 122°F)

  Resolution: 0.1°C at 25°C (0.18°F at 77°F)

  Response Time (90%): 5 minutes in water (typical) 

Operating Range: -20° to 50°C (-4° to 122°F) 

Logging Rate: 1 second to 18 hours

Time Accuracy: ±1 minute per month 0° to 50°C (32° to 122°F) 

Battery: Two AA, 1.5 V alkaline batteries, user replaceable

Memory: 256 KB memory (30,000 sets of measurements)